Hamdy Mohamed Ahmed

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The effects of three unsaturated free fatty acids on Helicobacter pylori growth in vitro was determined. Growth of H. pylori in Brucella broth was inhibited in a dose-dependent manner by arachidonic, linoleic and oleic acids. The degree of inhibition at any one concentration was related to the degree of fatty acid unsaturation. Triolein, a triacylglycerol(More)
The mode of transport of biliary lipids within the hepatocyte and the role of the bile canalicular membrane (BCM) in biliary lipid secretion are not well understood. We hypothesized that biliary cholesterol and phospholipid are co-transported across the hepatocyte in vesicular form from the endoplasmic reticulum to the bile across the BCM. We obtained wedge(More)
A search for new heavy particles manifested as resonances in two-jet final states is presented. The data were produced in 7 TeV proton-proton collisions by the LHC and correspond to an integrated luminosity of 315  nb⁻¹ collected by the ATLAS detector. No resonances were observed. Upper limits were set on the product of cross section and signal acceptance(More)
We measure the mass difference Δm0 between the D*(2010)+ and the D0 and the natural linewidth Γ of the transition D*(2010)+ → D0π+. The data were recorded with the BABAR detector at center-of-mass energies at and near the Υ(4S) resonance, and correspond to an integrated luminosity of approximately 477  fb(-1). The D0 is reconstructed in the decay modes D0 →(More)
We demonstrate a new high-order harmonic generation mechanism reaching the "water window" spectral region in experiments with multiterawatt femtosecond lasers irradiating gas jets. A few hundred harmonic orders are resolved, giving μJ/sr pulses. Harmonics are collectively emitted by an oscillating electron spike formed at the joint of the boundaries of a(More)
BACKGROUND & AIMS Gastric mucosal hydrophobicity is reduced in Helicobacter pylori infection. Infection density is increased in duodenal ulcer (DU) compared with H. pylori gastritis alone, but it is unknown whether there is a corresponding difference in hydrophobicity or whether hydrophobicity is related to infection density or to mucus lipids. The aim of(More)
Intercellular adhesion molecule-1, strongly expressed on the interlobular and proliferating bile ducts in primary biliary cirrhosis, is important in the migration and adhesion of inflammatory cells from the circulation to these structures. A soluble form has been found to be elevated in serum in primary biliary cirrhosis. Our aim was to check on the role of(More)
BACKGROUND Primary biliary cirrhosis (PBC) is a chronic cholestatic liver disease of unknown aetiology. A number of drugs have been used in its treatment, but only ursodeoxycholic acid (UDCA) has been shown to improve survival. Our aims were to determine the current prescribing habits in PBC of all practising gastroenterologists in the UK. METHODS A(More)
BACKGROUND Ursodeoxycholic acid (UDCA) improves liver function tests and prolongs survival in primary biliary cirrhosis (PBC). The dose of 10- 15 mg/kg/day used in the large trials has largely been based on that used for gallstone dissolution. The only dose-response study of UDCA in PBC suggested that a dose of 8 mg/kg/day was the most efficacious. However,(More)